This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: The terrestrial planets are made almost entirely of elements heavier than hydrogen and helium. ... (Read 680 times)

stevenposner

  • Hero Member
  • *****
  • Posts: 608
on: Jul 27, 2018
The terrestrial planets are made almost entirely of elements heavier than hydrogen and helium. According to modern science, where did these elements come from?
 
  A) They were produced by gravity in the solar nebula as it collapsed.
  B) They were produced by stars that lived and died before our solar system was born.
  C) They have been present in the universe since its birth.
  D) They were made by chemical reactions in interstellar gas.

Question 2

Briefly describe the evidence suggesting that a 10-km asteroid or comet hit Earth at the time of the dinosaur extinction.
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

rnehls

  • Sr. Member
  • ****
  • Posts: 313
Reply #1 on: Jul 27, 2018
Answer to Question 1

B

Answer to Question 2

A layer of clay at this level in the sediments is rich in materials found in asteroids but not normally found on Earth's surface. A crater off the Yucatan peninsula dates to the right time and is the right size.


stevenposner

  • Hero Member
  • *****
  • Posts: 608
Reply #2 on: Jul 27, 2018
Thanks


rnehls

  • Sr. Member
  • ****
  • Posts: 313
Reply #3 on: Jul 27, 2018
Welcome :)


« previous next »
 

Did you know?

A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

Did you know?

Every flu season is different, and even healthy people can get extremely sick from the flu, as well as spread it to others. The flu season can begin as early as October and last as late as May. Every person over six months of age should get an annual flu vaccine. The vaccine cannot cause you to get influenza, but in some seasons, may not be completely able to prevent you from acquiring influenza due to changes in causative viruses. The viruses in the flu shot are killed—there is no way they can give you the flu. Minor side effects include soreness, redness, or swelling where the shot was given. It is possible to develop a slight fever, and body aches, but these are simply signs that the body is responding to the vaccine and making itself ready to fight off the influenza virus should you come in contact with it.

Did you know?

The newest statin drug, rosuvastatin, has been called a superstatin because it appears to reduce LDL cholesterol to a greater degree than the other approved statin drugs.

Did you know?

The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

A portion of the periodic table of elements A portion of the periodic table of elements
Hydrogen Atom Hydrogen Atom
The Sun and the Planets The Sun and the Planets
“To confess my weakness,” Hamilton wrote when he was only fourteen, “my ambition is prevalent.” This “To confess my weakness,” Hamilton wrote when he was only fourteen, “my ambition is prevalent.” This
The elements of chromatin structure The elements of chromatin structure
Orbital Motion of Earth and Other Planets Orbital Motion of Earth and Other Planets
Video: Summation - defined, spatial, temporal & AP generation or not

For a complete list of videos, visit our video library